Beam by Slur

[Dan Eble]

I propose a new kind of autobeaming: beam by slur.

For beam by slur, beams are calculated according to the normal autobeam 
rules, then limited by the following two rules:

1. Only slurred notes may be beamed.

2. When the notes spanned by a slur are also spanned by a beam, the 
slur is not engraved.

This style is typical of hymn books, where eliminating slurs in the 
inner voices makes it easier to set the lyrics.

Can this be done easily?  I have inspected the source code for the beam 
and slur engravers (a couple months ago), but there is a lot of context 
required to understand it, so I've come here for advice.  It seems that 
some communication between the slur and beam engravers is required, but 
I don't know where to begin.

I am a software engineer, so I can try programming this myself, but a 
good push in the right direction will help me save time and avoid a 
poor solution.  Please copy replies to me because I am not subscribed 
to the list.

Thanks,
Dan